Jack for pumps and other purposes.



W. L'. DAYTON.

JACK FOR PUMPS AND OTHER PURPOSES.

APPLICATloN FILED APR.21, 1916.

me www Ferns r miran s'rarns PATENT ernten WILLIAM L. DAYTON, OF FORT WORTH, TEXAS, ASSIGNOR TO POWER REDUCTION COMPANY, F FORT WORTH, TEXAS, A CORPORATION OF TEXAS.

JACK FOR PUMPS AND OTHER PURPOSES.

Specification of Letters Patent.

Patented Oct. 10, 1916.

Application filed April 21, 1916. Serial No. 92,685.

To all whom t may concern Be it known that l, VILLIAM L. DAYTON, a citizen of the United States, residing at Fort Vorth, in the county of Tarrant and State of Texas, have invented certain new and useful Improvements in Jacks for Pumps and other Purposes, of which the following is a specilication.

My invention relates to pump jacks and more particularly to power mechanism which is provided with a shifting, balancing means, and the object is to provide a power mechanism which will aid the driving motor or power which is operating the pump jack.

The object is to provide a power mechanism with a weight which will aid the motor or other driving means, and to provide a means for shifting the weight so that the weight can be shifted so that the entire weight will be utilized on the up stroke and then shifted so that the force of the weight will be decreased on the down stroke. The advantage with such'construction or power mechanism is that there is a great saving in power, and a mechanism -is provided which can be used for other purposes than driving pump jacks; that is, for driving a shaft for various purposes.

Other objects and advantages will be fully explained-in the following description and the invention willbe more particularly pointed out in the claims.

Reference is had to the accompanying drawings which form a part of this application. l

Figure 1 is a plan view of the pump jack. Fig. 2 is a sidel elevation of the same. Fig. 3 is an end view or elevation. Fig. 4 is4 a vertical section through the main driving axle. Fig. is a plan view of a mechanism which is a variation from the mechanism previously shown. Fig. 6 is a detail view of a regulating mechanism which is shown in Fig. 5. I I Similar characters of reference are used to indicate the same parts throughout the several views.

The improved pump jack is provided with two upright frame pieces 1 and 2 which may be connected by sleeved bolts 3 for bracing purposes. The frames 1 and 2 are also braced by the main shaft 4 which is rigid in the frame for purposes hereinafter eX- plained. The drive wheel is a cog wheel 5. The wheel 5 is loosely mounted on the shaft 4 by means of a sleeve 6, the wheel being rigid with the sleeve. A driving crank. 7 is also rigid with the sleeve 6. The sleeve 6 is journaled in the frame pieces 1 and 2. The crank 7 has an arm 8 rigid therewith and spaced therefrom and aA radial shifting arm 9 is pivotally connected to an upright standardlO. The standard 10 is rigid with the shaft 4 and may be set at different positions. The shaft 4 is made ri'gid with the y frame by means of a bar 11 which is rigidly connected to the frame by suitable bolts 12 and by lthe nuts 13 and 14, one of these nuts acting as a' lock for the other. By loosening the nuts 13 and 14,'the standard 10 can be turned with the shaft 4 and when brought to the desired position, the nuts 13 and 14 then tightened on the bar 11. The radial shifting arm 9 is pivotally connected to the central portion of a weight 15,

the arm 9 having a plurality of holes 16 for receiving a pivot bolt 17 of the weight. The pivot bolt 17 projects through a slot 18 in the crank 7 and the weight 15 is yslidably mounted on the crank 7. A pitman rod 19 is pivotally connected to the arm 8 and to the piston rod 20. It is necessary to use the arm 8 so that the pivotal connection of the pitman 19 will not interfere with the working of the shifting arm 9,` the arm 8 merely throwing the wrist pin or pitman connection awa-y from the crank 7. This spacing of the pivotal connection of the pitman rod from the crank does not change the principle of operation.

Fig. 2 shows the position of the parts on the up-stroke of the piston rod. The sliding weight 15 is drawn away from the end of the crank 7 by means of the radial arm 9 which operates from a different center from the wheel 5. On the down-stroke thearm 9 will shove the weight 15 out to the end of the crank 7 so that the weight 15 will be exerted to force the piston rod down. Thus the weight 15 isutilized during the time the greatest work is being done by the piston rod. The weight 15 thus aids in driving the main drive wheel 5. A motor 21 is used vmeshes with the wheel 5.

the wheel 5 and the greatest amount of powerto be eXerted only to move the wheel 5 off of the two dead centers. The arm 8 .is provided with a rear extension 22 and an adjustable weight 23 is mounted on the arm 22 and adjusted thereon by a nut 24 for the purpose of increasing the utility of the radial arm 9 which moves the weight 15 from and toward the drive shaft 4 of the main drive wheel 5. The motor 21 drives the wheel 5 by means of a pinion 25 which The motor 21 may be provided lwith balance wheel 26.

The variation shown in Figs. 5 and 6 consists principally in an improved frame construction to avoid friction, the frame consisting of two bars 30 and 31 which are supported on uprightssimilar to uprights previously shown. A lbalance Wheel 32 is mounted on a shaft 33 which may be driven by any suitable power. This shaft is journaled in uprights 34 and A power wheel 36 is rigid with the same shaft and may be driven by any suitable power as by a gasolene motor shown in previous views. Pinions 37 are rigid with shaft 33 and drive cog wheels 38 which are rigid with a sleeve 39 which is journaled in the frame pieces 30 and 31. The cog wheels 38 drive cog wheels 40 which are mounted on a crank shaft 41 which is journaled in the frame pieces 30 and 31. The crank shaft 41 operates a power transmitting pitman rod42. The difference between the machine shown in Fig. 5 and in the previous views is that the crank shaft is j ournaled .in frame pieces 30 and 31, and these frame pieces balance vthe shaft so that the direct pull is on the twov fra-me pieces and between the frame pieces instead of on the outside of the frame as shown in the previous views. The improved attachments are the same in principle as those described in the previous views. A bar 43 is made rigid with the frame piece 30 and a shaft 44 on whichthe sleeve 39 is mounted is supported on the bar 43 and means are provided for making this shaft 44 rigid which means consists of a lever 45 which is rigid with the shaft 44. A standard 48 is also rigid with shaft 44. The bar 43 is provided with an arch 46 and the lever 45 may be attached to the bar 46 by a screw j bolt 47 at anyv point desirable to set'the standard 48 at any angle desirable togive the desired throw to the weight 50 which is connected tothe, standard 48 by the arm 49 which is pivotally connected to the standard The weight 5()` is moved by the radial arm 51 which is rigid with the sleeve 39 and which has a pivotal connection with the weight50, the Aoperation of these parts being theJ same as the arm 7 weight 15, standard 10, and arm 9 of the previous views. An adjustable weight 52 may bemounted on the short end of arm 51 to aid in creating a proper adjustment of the weight 50. A platform 53 may be attached to the frame of the machine shown in Fig. 5 for convenience in mounting a motor for driving the power wheel 5.

What I claim, is-- 1. A pump jack comprising a frame, a main drive wheel operatively mounted in said frame, a crank rigid with said wheel, means for driving said wheel, a slidable weight mounted on said crank and a radial arm pivotally mounted and off-set relative to the center of said wheel and pivotally connected to said weight.

2. A pump jack comprising a frame, a shaft rigid with said frame, a drive wheel mounted loosely on said shaft, means for driving said wheel, a crank bar rigid with said wheel, a slidable weight mounted on said crank bar, a standard rigid with said shaft and projecting therefrom, and a ra-A dial arm pivotally connected to said standard and pivotally connected to said weight.

3. A pump jack comprising a frame, a shaftrigid with said frame, a drive wheel mounted loosely on said shaft and providedl with a sleeve, a crank bar rigid kwith said sleeve, a standard rigid with said shaft, a slidable weight mounted on said crank bar, a radial arm pivotally connected to said standard and to said slidable weight, and means for driving said wheel.

4. A pump jack comprising a frame, a shaft rigid with said frame, a drive wheel mounted loosely on said shaft, a crank bar rigid with said wheel, a pitman ro'dpivotally connected to said crank bar and to a pump rod, a weight slidably mounted on said crank bar, a radial arm provided with a pivot off-set relative to said shaft and pivotally connected to said weight, and means for driving said wheel.

5. A pump jack comprising a frame, a shaft rigid with said frame, a drive wheel mounted loosely on said shaft, a crank bar rigid with said wheel, a weight slidably mounted on said crank bar, a pivot rigid with said shaft and off-set therefrom, and a radial arm` engaging said pivot and pivotally connected with said weight.

6. A pump jack comprising a frame, a shaft rigid vwith said frame, a drive wheel loosely mounted on said shaft, a crank bar pivoted on'said shaft and rigid with said wheel, a weight slidably mounted on said crank bar, a standard rigid with said shaftv and carrying a pivot, a radial arm engaging said pivot and pivotally connected to said weightand means for. driving said wheel.

7. A -pump jack comprising a frame, a shaft rigid with said frame, a ydrive wheel loosely mounted on said shaft, a crank bar rigid with said wheel and pivotally mounted on said shaft and having one end bent to form an arm olf-set therefrom, a pitman rod y connected to said arm, a pivot rigid a 'ber rigid with said Wheel, a pivot rigid With said shaft and off-set therefrom, a slidable Weight movable radially relatively to said shaft and Wheel and on said guide member, a radial member engaging said pivot and pivotally connected to said Weight for reciprocating said Weight during each revolution of said Wheel, and a crank connection on said Wheel. l

9. A power mechanism comprising a frame, a shaft rigid With said frame, a drive Wheel journaled in said frame and loosely mounted on said shaft, a slidable Weight movable radially relative to said shaft and Wheel and operatively connected With said Wheel, means for reciprocating said Weight at predetermined times during each revolution of said Wheel and a power transmitting connection with said Wheel.

In testimony whereof, I 11th day of April, 1916.

` WILLIAM L. DAYTON.

set my hand this Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

